The executive producer of The Good Wife has revealed details of America Ferrera's guest role on the show.

Speaking to TV Guide, Robert King explained that the Ugly Betty star will play an undocumented college student who wants to become an American citizen.

"She's only known America, and she may be exposed as undocumented," King revealed. "[The story deals with] what that will mean for her."

King also hinted that Ferrera's character will have a big impact on Eli (Alan Cumming), saying: "Eli thinks he has something he can use politically, but then he also gets mixed feelings and guilt about it, because it's based on using America Ferrera.

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"Usually he's a gung-ho, Rahm Emanuel-type who will do whatever it takes. Here, he's finding that there are some questions about how far he will go with that."

The Good Wife airs on Tuesdays at 10/9c on CBS in the US and on Thursdays at 9pm on More4 in the UK.